JimmyDubai
Member
- Oct 13, 2015
- 351
- Boat Info
- Sundancer 290 1996, one big block Mercruiser 7.4 LT
Simrad Go9 XSE + 3G radar
- Engines
- One, Mercruiser 7.4 V8, 310 HP
Hi, The boat went for service ( Mercruiser 7.4 Lt V-8 carb) and the raw seawater pump was replaced among other things. We went for a ride and on the way back we noticed a squeaky noise coming from the engine. A few more nautical miles and the engine quit.
This morning I went to the marina and managed to remove the fuel pump. The questions below will show you the findings:
- Can you possibly move the lever with your own hands? I found it very stiff to move! Actually it looks like that lever is stuck
- On the engine side I found a bushing that moves freely with a play of I guess 1/32" (or less than 1 mm) which is the part that is always in contact with the lever. That part was completely dry, no oil, no water, nothing, the contact was metal to metal. I could see as well that there is a play of maybe 1/32 or less than 1 mm between the bushing and the shaft. My question is: how is the lubrication in this part? To me the squeaky noise that I heard was coming right from these three parts (shaft, bushing and lever dead dry).
Could potentially the replacement of the sea water impeller be the cause due to a wrong procedure? remember that all these items are part of the same thing (pulley, V-belt, eccentric fuel pump shaft, fuel pump, raw seawater impeller shaft and plastic body.
Your comments please?
Thanks
This morning I went to the marina and managed to remove the fuel pump. The questions below will show you the findings:
- Can you possibly move the lever with your own hands? I found it very stiff to move! Actually it looks like that lever is stuck
- On the engine side I found a bushing that moves freely with a play of I guess 1/32" (or less than 1 mm) which is the part that is always in contact with the lever. That part was completely dry, no oil, no water, nothing, the contact was metal to metal. I could see as well that there is a play of maybe 1/32 or less than 1 mm between the bushing and the shaft. My question is: how is the lubrication in this part? To me the squeaky noise that I heard was coming right from these three parts (shaft, bushing and lever dead dry).
Could potentially the replacement of the sea water impeller be the cause due to a wrong procedure? remember that all these items are part of the same thing (pulley, V-belt, eccentric fuel pump shaft, fuel pump, raw seawater impeller shaft and plastic body.
Your comments please?
Thanks
